TAILIEUCHUNG - ielts for academic purposes 6 practice tests with key phần 4

Vật liệu cốt lõi cung cấp khoảng 40 giờ giảng dạy, trong khi một số cốt thép khác nhau và các tùy chọn mở rộng được cung cấp trong các thành phần khóa học khác. Sách của sinh viên bao gồm 8 đơn vị dựa trên chủ đề, tập trung vào phát triển các kỹ năng thi chính | Questions 38-40 Complete the summary below. Write NO MORE THAN TWO WORDS for each answer. In October 1962 US President Kennedy met advisers to discuss 38 which proved that the Cubans were installing nuclear missiles presumably to use against the US. Kennedy was faced with three choices to try to resolve the crisis diplomatically to block the delivery of further weapons into Cuba or to attack Cuba. Kennedy chose 39 option which prevented the build-up of more missiles and led to the withdrawal of the existing ones. Most are agreed that a 40 was narrowly avoided by Kennedy s decision. 44 TEST 3 READING READING PASSAGE 1 You should spend about 20 minutes on Questions 1-13 which are based on Reading Passage 1 below. How Mobile Telephony Turned into a Health Scare The technology which enabled mobile phones was previously used in the kind of two-way radio which could be found in taxis and emergency vehicles. Although this was a great development it was not really considered mobile telephony because it could not be used to dial into existing phone networks. It was known as simplex technology operating on the same principles as a walkie-talkie which required that a user press a button meaning that only one person at a time could talk. Simplex meant that there was only one communication frequency in use at any one time. The first mobile phones to connect to telephone networks were often installed in cars before the hand-held version came on the market and the revolution in mobile technology began. The first generation of mobile phones called 1G were large heavy and analogue and it was not until the invention of the second generation 2G in the 1990s that digital networks could be used. The digital element enabled faster signalling. At the same time developments in battery design and energy-saving electronics allowed the phones themselves to become smaller and therefore more truly mobile. The second generation allowed for text messaging too and this began with the first .

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